Exercise device



FIG. 1 is a perspective view of an exercise device showing my new design;

FIG. 2 is a left side elevational view with the opposite side being a mirror image thereof;

FIG. 3 is an end elevational view with the opposite side bieng a mirror image thereof;

FIG. 4 is a top plan view with the oposite side being a mirror image thereof;

FIG. 5 is a side view showing the exercise device in condition of use with the interior ball element in a centered position;

FIG. 6 is a side view showing the exercise device in condition of use with the interior ball element in a right end position; and,

FIG. 7 is a side view showing the exercise device in condition of use with the interior ball element in a left end position.

The broken lines showing an ankle and gym shoe in FIGS. 5-7 illustrate environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a exercise device, as shown and described. 